i recently got a co2 tank and was wondering what people run their ppm at. my room is 10x10. not sure if that matters. i've heard 1300, 1500, 2000 ppm during lights on cyle. which is best? right now it's around 1500 -2000 daytime and 300-500 at nite. does this sound o.k.? thanks. check out my grow http://forum.grasscity.com/general-...s-lst-scrog-dwc-first-grow-5.html#post6787406
1500ppm is the level most set thier systems at during the day...and no reason for CO2 when lights are out. You using a controller to set the ppm level at? Or are you trying to use a timer? Is your room sealed? Numb
i'm trying to use a timer. i'm not running any co2 at nite, during the day i run it for 15 min. every hour. i got a cheesy co2 test kit. it's reading around 1800-2000ppm after the co2 is on for the 15 min. 45 min. later, just before it kicks back on, it is around 1000 ppm. yes my room is sealed. all fans turn of while co2 is emmiting.